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English Laboratory Induction Coil, c. 1900...
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Demonstration Model of an Early Electric Moto...
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French Experiment Box for Demonstrating Elect...
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Measuring Bridge by Siemens & Halske, c. 1890...
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Gebrüder Kaiser Alternating Current Electric ...
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Measuring and Laboratory Equipment, c. 1910 o...
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Power Factor Measuring Instrument by Brown, B...
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Group of Physical Demonstration Models, c. 19...
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Large Current Converter by Brägestu, c. 1925...
